Ratchet drill



H. F. HOWELL.

RATCHET DRILL.

APPLICATION HLED 1AN.15.1921.

Patented Jan. 17, 1922.

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RATCHET DRILL.

APPLICATION FILED IAN. I5. |921.

Patented Jan. 17, 1922.

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UNITED STATES HENRY F. HOWELL, OF DIVIDE, WEST VIRGINIA.

RATCHET DRILL.

Application filed January 15, 1921.

To (JZ whom t may concern.'

Be it known that I, HENRY F. HOWELL, a citizen of the United States, residing at Divide, in the county of Fayette and State of Test Virginia, have invented certain new and useful Improvements in Ratchet Drills, of which the following is a Specification, reference being had to the accompanying drawings.

This invention relates to certain improvements in ratchet drills, and it is an object of the invention to provide a novel and improved device of this character including a tool carrying shank in threaded engagement with a working barrel and with which is associated an operating lever adapted to be .reversely swung or rocked, together with coacting means carried by the shank and lever whereby the shank may be rotated upon swinging movement of the lever in both directions.

Another object of the invention is to provide a device of this general character with novel and improved means whereby the extent of rotation of the tool carrying shank upon rocking or swinging movement of the operating lever may be regulated or varied or whereby the lever may be rendered inoperative upon movement in one direction.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved ratchet drill whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein:

Figure l is a view partly in elevation and partly in section of a ratchet drill constructed in accordance with an embodiment of my invention.

Figure 2 is a view partly in end elevation and partly in section of the device as illustrated in Figure l.

Figure 3 is a sectional view taken substantially on the line 3 3 of Figure 1.

Figure 4 is a view in top plan of the device herein embodied.

Figure 5 is a view in elevation of the platel Specification of Letters Patent.

Patented Jan. 1'7, 1922.

Serial No. 437,590.

herein included and upon which is pivotally mounted a lever for operating one of the pawls.

Figure 6 is a view in elevation of the arm or strap coacting with the pivoted lever as particularly illustrated. in Figure 5 for impating swinging movement to said lever, an

Figure 7 is a sectional view taken substantially on the line 7--7 of Figure 4.

As disclosed in the accompanying drawings, l denotes an elongated working barrel open at one end and closed at the opposite end, the closed end portion being provided with the taper. or point V2 for a well known purpose. The open end portion of the barrel l is provided with an internal nut 3 having in threaded engagement therewith the elongated shank 4, said shank extending inwardly of the barrell.

The outer end portion of the shankr4 is provided with an enlargement or head 5 provided in its outer face with a socket 6 to receive the boring tool or bit. The shank 4 inwardly of the head 5 but in close proximity thereto has fixed thereon a ratchet wheel 7 and looselyor freely engaged with the shank 4 at opposite sides of the ratchet wheel 7 are straps or arms 8 and 9, the strap or arm 8 being arranged between the head 5 and the ratchet wheel 7 and the strap or arm 9 being arranged inwardly of the ratchet wheel 7.

The straps 8 and 9 overlie the side faces of an operating lever L of desired length and. are suitably secured thereto. Pivot'ally supported between the straps or arm 8 and 9 is a pawl 10. The pawl 10 coacts in a conventional manner with the ratchet wheel 7 and upon swinging o'r rocking movement of the lever L in one direction, said pawl l0 engages the ratchet wheel 7 to eifect rotation of the shank 4 in a direction to cause said shank to-travel or move outwardly with respect to the barrel 1.

The shank 4 extends through an end portion of an elongated plate 11, said plate being positioned in close proximity to the strap or arm 9. Disposed through the shank 4 inwardly of the plate 11 is a key 12 coacting with the plate l1 in a manner whereby said plate is caused to move outwardly with the shank 4. Upon inward movement of the shank 4, the strap or arm 9 contacts with said plate l1 to cause the same to move inwardly with the shank 4.

Suitably secured to the plate 11 at a desired distance outwardly from `the shank 4 and the barrel 1 and at transversely spaced points are the similar end portions of the parallel rods 14. The rods 14 extend inwardly ofthe barrel 1 in parallelism therewith and the end portions of said rods remote from the plate 11 are secured to the plate 15 slidably mounted upon the barrel 1.

Mounted upon the end portion of the barrel 1 adjacent the open end thereof is a sleeve 16`which is adapted to be locked to the barrel 1 by the binding screws 17. The sleeve 16 isprovided with an outstanding plate 18 disposed in the same direction as the plate 11 and through which the rods 1 4 are slidably disposed. `The rods 14 operate to hold the plate 11 against lateral movement independently of theshank 4.

The end portion of the strap or arm 9 mounted upon` the shank 4 is provided with an outwardly directed tail-piece 19. The tail-piece 19 carries a laterally directed part 20 which rides within the slot 21 eirtending lengthwise of the lever 22. The lever 22 is' pivotally supported at 23 by the plate 11 and the pivoted end portion of the lever 22 is continued by the laterally di-y rected extension 24.` The outer or free end portion of the extension 24 is provided with a lug 25 extending outwardly therefrom in a direction lengthwisefof the barrel 1.

Pivotally engaged with the lug 25 is an end portion of an elongated pawl 26 adapted to engage the ratchet wheel 7 upon movement of the lever L in one direction or when the lever L is moving in a direction to return the pawl 10. The pawl 26 is freely disposed through a tubular member or barrel27 carried by an end portion of an arcuate plate 28. The opposite end portion of the plate 2S overlies a forwardly or outwardly disposed extension 29 carried by the outer end portion of the plate 11.

The portion ofthe 4plate 28 which overlies the. extension 29 is provided with a slot 3() through which extends the shank of a clamping bolt 31 in threaded engagement withthe extension 29. The clamping bolt 21 in connection with the slot 30 provides means wh ere-by the tubular member or sleeve 27 may be adjusted with respect to the ratchet wheel 7 to regulate the extent of rotation of the ratchet wheel 7 through the instrumentality of the pawl 26 or to hold said pawl in a position at all times free of the ratchet wheel 7. When the tubular member or sleeve 27 is in this last named position, the shank 4 will only be rotated upon movement of the lever L in one direction and as effected by the pawl 10.

My ratchet drill is particularly adapted for use in the boring of rock, slate, coal and the like, and after the drilling or boring operation has been completed, the tool may be readily and conveniently withdrawn by releasing the screws 17 from binding action upon the barrel 1 so that said barrel 1 may be freely rotated in a direction to cause the shank 4 to move inwardly of the barrel 1.

In order to facilitate the desired functioning of the pawl 26, I provide the arcuate member 28 with the spring 32 coacting with the pawl 26 and constantly urging the same in a direction toward the ratchet'wheel 7. The pawl 10 also has coacting therewith a spring 33 for constantly urging the same toward the ratchet wheel 7 and whereby the desired action of the pawl 10 is assured irrespective of the position of the device in its entirety.

From the foregoing description it is thought to be obvious that a ratchet drill constructed in accordance with my invention is particularly well adapted for use by reason. of the convenience and facility with which. it may be assembled and operated, and it will also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason I do not wish to lbe understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in practice except as hereinafter claimed.

I claim:

1. A 'device of the character described comprising two members in threaded engagement one with the other, a ratchet wheel fixed to one of said members, a lever engaged with said member for swinging movement, a pawl carried by said member for coaction with the ratchet wheel to rotate said member upon movement of the lever in one direction, a plate carried by said member, a lever pivoted to said plate, both of said levers being provided with coacting means whereby said levers swing in unison, and a pawl carried by the second named lever and coacting with the ratchet wheel, said'second named pawl engaging the Aratchet wheel to rotate the member upon movement of the first named lever to return lthe pawl carried thereby.

2. A device of the character described comprising two members in threaded engagement one with the other, a ratchet wheel fixed to one of said members, a lever engaged with said member for swinging' movement, a pawl carried by said member for coaction with the ratchet wheel to rotate said member upon movement of the lever in one direction, a plate carried by'said member, a lever pivoted to said plate, both of said levers being provided with coasting means whereby said levers swing in unison, a pawl carried by the second named lever and coacting with the ratchet wheel, said second named pawl engaging the ratchet wheel to rotate the member upon movement of the first named lever to return the pawl carried thereby, and means carried by the plate for adjusting the second named pawl with respect to the ratchet wheel.

3. A device of the character described comprising two members in threaded engagement one with the other, al ratchet wheel xed to one of said members, a lever engaged with said member for swinging movement, a pawl carried by said member for coaction with the ratchet wheel to rotate said member upon movement of the lever in one direction, a plate carried by said member, a lever pivoted to said plate, both of said levers being provided with coacting means whereby said levers swing in unison, a pawl carried by the second named lever and coacting with the ratchetv wheel, said second named pawl engaging the ratchet wheel to rotate the member .upon movement of the first named lever to return the pawl carried thereby, and a second plate adjustably connected with the first named plate, said second named plate being provided with a sleeve through which the second named pawl is freely directed. y

4:. A device of the character described comprising two members in threaded engament one with the other, a ratchet wheel fixed to one of said members, a lever engaged with said member for swinging movement, a pawl carried by said member for coaction with the ratchet wheel to rotate said membei upon movement of the lever in one direction, a plate carried by said member, a lever pivoted to said plate, both of said levers being provided with coacting means whereby said levers swing in unison, a pawl carried by the second named lever and coacting with the ratchet wheel, said second named pawl engaging the ratchet wheel to rotate the member upon movement of' the first named lever to return the pawl carried thereby, and a second plate adjustably connectedV with the first named plate, said second named plate being provided with a sleeve through which the second named pawl is freely directed, said second named plate being arcuate.

5. A device of the character described comprising two members in threaded engagment one with the other, a ratchet wheel fixed to one of said members, a lever engaged with said member for swinging movement, a pawl carried by said member for coaction with the ratchet wheel to rotate said member upon movement of the lever in one direction, a. plate carried by said member, a lever pivoted to said plate, both of said levers being provided with coacting means whereby said levers swing in unison, a pawl carried by the second named lever and coacting with the ratchet wheel, said second named pawl engaging the ratchet wheel to rotate the member upon movement of the first named lever to return the pawl carried thereby, a second plate adjustably connected with the first named plate, said second named plate being provided with a sleeve through which the second named pawl is freely directed, said second named plate being arcuate, and provided with a longitudinally disposed slot, the first named plate being provided with an angular extension, the arcuate plate overlying said extension, and a member carried by the extension of the first named plate and extending through the slot of the arcuate plate for locking the arcuate plate in its different adjustments. n

6. A device of the character described vcomprising two members in threaded engagement one with the other, a ratchet wheel fixed to one of said members, a lever engaged with said member for swinging movement, a pawl carried by said member for coaction with the ratchet wheel to rotate said member upon movement of the lever in one direction, a plate carried by saidmember, a lever pivoted to said plate, both of said levers being provided with coacting means whereby said levers swing in unison, a pawl carried by the second named lever and coacting with the ratchet wheel, said second named pawl engaging the ratchet wheel 'to rotate the member upon movement of the first named lever to return the pawl carried thereby, two plates mounted upon the barrel, one of said plates being slidable therealong, means for locking the second plate to the barrel, and a rod secured to the first named plate and the slidable plate, said rod being slidably disposed through the last named plate.

In testimony whereof I hereunto afiix my signature.

HENRY r. HOWELL. 

